Credit: Faith Ninivaggi

Credit: Faith Ninivaggi

When Amanda Hellen was 6 years old, she and her twin sister, Merri, went to their first concert: New Kids on the Block.

“If anyone would have told me 24 years later they’d be coming to the house for a party ...” the 30-year-old Somerville gal told the Track. “I’m probably going to faint.”

Luckily, Amanda held it together yesterday when Donnie, Joey, Jordan, Jonathan and Danny arrived at Merri’s Medford home for a pizza party — the grand prize in Mix 104.1’s New Kids on Your Block Party contest.

Amanda entered a few weeks back, penning an impassioned treatise on why she deserved to have the former boy banders at her house. Turns out, she had The Right Stuff, and her phone rang at 6:30 a.m. the other day — the morning after she and Merri and some pals had returned from seeing NKOTB at Mohegan Sun.

“Merri started yelling, ‘You won! You won!’” she said, and sure enough, it was Mix DJs Karson and Kennedy on the line.

Amanda was allowed to have 35 friends over for the party, and making the guest list was tougher than scoring backstage access to Donnie’s dressing room!

“People came out of the woodwork,” she laughed. “They were like, ‘Wanna hang out?’ Um, no. We had a hardcore group of friends who go to all the shows with us. And we let our parents come.”

Well, that was only fair. After all, it was Amanda and Merri’s mom who let them go to that concert with a pack of fellow mini-NKOTB fans and a friend’s mother 24 years ago.